I can find the HP Office Jet 6500 scanner using sane-find-scanner as you can see below, but sudo xsane finds no devices.
What am I doing wrong?
/ Hello! $su
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.
# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a kernel SCSI driver for your SCSI adapter.
found USB scanner (vendor=0x0bb4, product=0x0c97) at libusb:002:007
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.
# Not checking for parallel port scanners.
# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
No protocol specified
(xsane:18206): Gtk-WARNING **: cannot open display: :0
/ Hello! $sudo xsane
[sudo] password for tarahmarie: